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水工建筑物下的弹性渗流现象,表现为由于上下游的水压力变化,例如由于水位上升或爆破,在水工建筑物底面上所引起的压力重新分配过程,不是瞬时的而是滞后的,这种滞后是由于在土壤水中所含的水、地基土和空气的弹性作用造成的。在渗流的弹性状态下,如果忽略土的位移影响,而只考虑土孔隙内水的运动,液体和地层的压缩性,同时地层的压缩性表现为孔隙体积大小的变化。那么对于在底板下的
The phenomenon of elastic seepage under hydraulic structures is manifested by the pressure redistribution caused by the water pressure upstream and downstream, such as rising or blasting of the water level, on the bottom of the hydraulic structure, not instantaneously but lagging, This hysteresis is due to the elastic effect of water, subsoil and air contained in the soil water. In the elastic state of seepage, if we neglect the influence of soil displacement, we only consider the movement of water in soil pores, the compressibility of liquid and formation, and the compressibility of formation shows the change of pore volume. So for the under floor